ITU-T Series K
Transcript of ITU-T Series K
I n t e r n a t i o n a l T e l e c o m m u n i c a t i o n U n i o n
ITU-T Series K TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU
Supplement 10 (11/2017)
SERIES K: PROTECTION AGAINST INTERFERENCE
Analysis of electromagnetic compatibility aspects and definition of requirements for 5G systems
ITU-T K-series Recommendations – Supplement 10
K series – Supplement 10 (11/2017) i
Supplement 10 to ITU-T K-series Recommendations
Analysis of electromagnetic compatibility aspects and definition
of requirements for 5G systems
Summary
Supplement 10 to ITU-T K-series Recommendations provides guidance on the electromagnetic
compatibility (EMC) compliance assessment considerations for 5G systems. Given the 5G radio
access network (RAN) technical standards are still being finalised, the first version of this
Supplement focuses on possible emission and immunity requirements for 5G systems. This
Supplement will be revised, if needed, to address the more specific EMC requirements when
technical standards of 5G systems are published.
History
Edition Recommendation Approval Study Group Unique ID*
1.0 ITU-T K Suppl. 10 2017-11-22 5 11.1002/1000/13474
Keywords
5G, electromagnetic compatibility, EMC, wireless.
* To access the Recommendation, type the URL http://handle.itu.int/ in the address field of your web
browser, followed by the Recommendation's unique ID. For example, http://handle.itu.int/11.1002/1000/11
830-en.
ii K series – Supplement 10 (11/2017)
FOREWORD
The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of
telecommunications, information and communication technologies (ICTs). The ITU Telecommunication
Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical,
operating and tariff questions and issuing Recommendations on them with a view to standardizing
telecommunications on a worldwide basis.
The World Telecommunication Standardization Assembly (WTSA), which meets every four years,
establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on
these topics.
The approval of ITU-T Recommendations is covered by the procedure laid down in WTSA Resolution 1.
In some areas of information technology which fall within ITU-T's purview, the necessary standards are
prepared on a collaborative basis with ISO and IEC.
NOTE
In this publication, the expression "Administration" is used for conciseness to indicate both a
telecommunication administration and a recognized operating agency.
Compliance with this publication is voluntary. However, the publication may contain certain mandatory
provisions (to ensure, e.g., interoperability or applicability) and compliance with the publication is achieved
when all of these mandatory provisions are met. The words "shall" or some other obligatory language such as
"must" and the negative equivalents are used to express requirements. The use of such words does not
suggest that compliance with the publication is required of any party.
INTELLECTUAL PROPERTY RIGHTS
ITU draws attention to the possibility that the practice or implementation of this publication may involve the
use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence, validity or
applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of
the publication development process.
As of the date of approval of this publication, ITU had not received notice of intellectual property, protected
by patents, which may be required to implement this publication. However, implementers are cautioned that
this may not represent the latest information and are therefore strongly urged to consult the TSB patent
database at http://www.itu.int/ITU-T/ipr/.
ITU 2018
All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the
prior written permission of ITU.
K series – Supplement 10 (11/2017) iii
Table of Contents
Page
1 Scope ............................................................................................................................. 1
2 References ..................................................................................................................... 1
3 Definitions .................................................................................................................... 3
3.1 Terms defined elsewhere ................................................................................ 3
3.2 Terms defined in this Supplement .................................................................. 4
4 Abbreviations and acronyms ........................................................................................ 4
5 Conventions .................................................................................................................. 5
6 Overview of 5G networks ............................................................................................. 5
6.1 5G spectrum .................................................................................................... 5
6.2 How 5G works ................................................................................................ 6
6.3 5G working with 4G ....................................................................................... 6
7 Currently defined EMC requirements .......................................................................... 6
7.1 Emission requirements in [CISPR 32] ........................................................... 7
7.2 Immunity requirements in [CISPR 35] ........................................................... 9
8 Analysis of the published EMC requirements in respect to 5G scenario ..................... 13
9 Proposal of EMC requirements for the deployment of 5G networks ........................... 14
9.1 Radiated emissions ......................................................................................... 14
9.2 Conducted emissions on AC mains port ........................................................ 14
9.3 Conducted emissions on DC power port ........................................................ 14
9.4 Conducted emissions on wired network ports ................................................ 15
9.5 Immunity requirements on enclosure port ...................................................... 15
9.6 Immunity requirements on analogue and digital signal and network ports .... 15
9.7 Immunity requirements on AC mains port ..................................................... 17
9.8 Immunity requirements on DC power port .................................................... 18
10 Recommendation for future work ................................................................................. 18
Bibliography............................................................................................................................. 19
K series – Supplement 10 (11/2017) 1
Supplement 10 to ITU-T K-series Recommendations
Analysis of electromagnetic compatibility aspects and definition
of requirements for 5G systems
1 Scope
This Supplement provides an analysis of the electromagnetic compatibility (EMC) requirements for
5G systems to ensure operation of these systems and avoid interference with other devices/systems.
This Supplement covers:
– Analysis of the present available EMC ITU-T Recommendations and standards and works
in IEC/CISPR and ETSI EMC technical committees;
– Definition of the requirements for EMC management in the scenario of 5G systems
This Supplement does not address the co-existence of 5G systems with other radio systems because
this subject is being addressed by ITU-R.
The EMC specifications proposed in this Supplement will be revised when the 5G transmitter and
receiver specifications are published and with consideration of the ongoing work done in other
standardization organizations such as IEC/CISPR and ETSI.
2 References
[ITU-T K.48] Recommendation ITU-T K.48 (2006), EMC requirements for
telecommunication equipment – Product family Recommendation.
[CISPR 11] CISPR 11 (06/2015), A1 (06/2016), Industrial, scientific and medical
equipment – Radio-frequency disturbance characteristics – Limits and
methods of measurement. https://webstore.iec.ch/publication/22643
[CISPR 16-2-1] CISPR 16-2-1:2014, A1 (06/2017), Specification for radio disturbance and
immunity measuring apparatus and methods – Part 2-1: Methods of
measurement of disturbances and immunity – Conducted disturbance
measurements. https://webstore.iec.ch/publication/40
[CISPR 16-2-3] CISPR 16-2-3:2016, Specification for radio disturbance and immunity
measuring apparatus and methods – Part 2-3: Methods of measurement of
disturbances and immunity – Radiated disturbance measurements. https://webstore.iec.ch/publication/25877
[CISPR 32] CISPR 32:2015, Electromagnetic compatibility of multimedia equipment –
Emission requirements. https://webstore.iec.ch/publication/22046
[CISPR 35] CISPR 35:2016, Electromagnetic compatibility of multimedia equipment –
Immunity requirements. https://webstore.iec.ch/publication/25667
[ETSI EN 300 386] ETSI EN 300 386 V2.1.1 (2016), Electromagnetic compatibility and Radio
spectrum Matters (ERM); Telecommunication network equipment;
ElectroMagnetic Compatibility (EMC) requirements. http://www.etsi.org/deliver/etsi_en/300300_300399/300386/02.01.01_60/en_300386v020101p.pdf
2 K series – Supplement 10 (11/2017)
[ETSI EN 301 489-1] ETSI EN 301 489-1 V2.1.1 (2017), ElectroMagnetic Compatibility (EMC)
standard for radio equipment and services; Part 1: Common technical
requirements; Harmonised Standard covering the essential requirements of
article 3.1(b) of the Directive 2014/53/EU and the essential requirements of
article 6 of the Directive 2014/30/EU; Part 1: Common technical
requirements. http://www.etsi.org/deliver/etsi_en/301400_301499/30148901/02.01.01_60/en_30148901v020101p.pdf
[IEC 61000-2-5] IEC 61000-2-5:2017, Electromagnetic compatibility (EMC) – Part 2-5:
Environment – Description and classification of electromagnetic
environments. https://webstore.iec.ch/publication/59812
[IEC 61000-4-2] IEC 61000-4-2:2008, Electromagnetic compatibility (EMC) – Part 4-2:
Testing and measurement techniques – Electrostatic discharge immunity test. https://webstore.iec.ch/publication/4189
[IEC 61000-4-3] IEC 61000-4-3:2006), AMD1:2007 and AMD2:2010, Electromagnetic
compatibility (EMC) – Part 4-3: Testing and measurement techniques –
Radiated, radio-frequency, electromagnetic field immunity test. https://webstore.iec.ch/publication/4212
[IEC 61000-4-4] IEC 61000-4-4 (04/2012), Electromagnetic compatibility (EMC) – Part 4-4:
Testing and measurement techniques – Electrical fast transient/burst
immunity test. https://webstore.iec.ch/publication/22271
[IEC 61000-4-5] IEC 61000-4-5:2014, AMD1:2017, Electromagnetic compatibility (EMC) –
Part 4-5: Testing and measurement techniques – Surge immunity test. https://webstore.iec.ch/publication/61166
[IEC 61000-4-6] IEC 61000-4-6:2013, Electromagnetic compatibility (EMC) – Part 4-6:
Testing and measurement techniques – Immunity to conducted disturbances,
induced by radio-frequency fields. https://webstore.iec.ch/publication/4224
[IEC 61000-4-8] IEC 61000-4-8:2009, Electromagnetic compatibility (EMC) – Part 4-8:
Testing and measurement techniques – Power frequency magnetic field
immunity test. https://webstore.iec.ch/publication/22272
[IEC 61000-4-11] IEC 61000-4-11:2004, AMD1:2017, Electromagnetic compatibility (EMC) –
Part 4-11: Testing and measurement techniques – Voltage dips, short
interruptions and voltage variations immunity tests. https://webstore.iec.ch/publication/60729
[IEC 61000-4-20] IEC 61000-4-20:2010, Electromagnetic compatibility (EMC) – Part 4-20:
Testing and measurement techniques – Emission and immunity testing in
transverse electromagnetic (TEM) waveguides. https://webstore.iec.ch/publication/4190
[IEC 61000-4-21] IEC 61000-4-21:2011, Electromagnetic compatibility (EMC) – Part 4-21:
Testing and measurement techniques – Reverberation chamber test methods. https://webstore.iec.ch/publication/4191
[IEC 61000-6-1] IEC 61000-6-1:2016, Electromagnetic compatibility (EMC) – Part 6-1:
Generic standards – Immunity for residential, commercial and light-
industrial environments. https://webstore.iec.ch/publication/25628
K series – Supplement 10 (11/2017) 3
[IEC 61000-6-2] IEC 61000-6-2 (08/2016), Electromagnetic compatibility (EMC) – Part 6-2:
Generic standards. Immunity standard for industrial environments. https://webstore.iec.ch/publication/25629
[IEC 61000-6-3] IEC 61000-6-3:2006, AMD1:2010, Electromagnetic compatibility (EMC) –
Part 6-3: Generic standards – Emission standard for residential, commercial
and light-industrial environments. https://webstore.iec.ch/searchform&q=IEC%2061000-6-3
[IEC 61000-6-4] IEC 61000-6-4:2006, AMD1:2010, Electromagnetic compatibility (EMC) –
Part 6-4: Generic standards – Emission standard for industrial environments. https://webstore.iec.ch/publication/4251
3 Definitions
3.1 Terms defined elsewhere
This Supplement uses the following terms defined elsewhere:
3.1.1 AC mains power port [CISPR 32]: Port used to connect to the mains supply.
3.1.2 analogue/digital data port [CISPR 32]: Signal/control port, antenna port, wired network
port, broadcast, receiver tuner port, or optical fibre port with metallic shielding and/or metallic
strain relief member(s)
3.1.3 antenna port [CISPR 32]: Port, other than a broadcast receiver tuner port (3.1.8), for
connection of an antenna used for intentional transmission and/or reception of radiated RF energy
3.1.4 auxiliary equipment (AE) [IEC 61000-4-4]: Equipment necessary to provide the
equipment under test with the signals required for normal operation and equipment to verify the
performance of the EUT.
3.1.5 broadcast receiver turner port [CISPR 32]: Port intended for the reception of a
modulated RF signal carrying terrestrial, satellite and/or cable transmissions of audio and/or video
broadcast and similar services
3.1.6 DC network port [CISPR 32]: Port, not powered by a dedicated AC/DC power converter
and not supporting communication, that connects to a DC supply network
3.1.7 electromagnetic compatibility (EMC) [b-IEC 60050-161]: Ability of equipment to
function satisfactorily in its electromagnetic environment without introducing intolerable
electromagnetic disturbances to anything in that environment.
3.1.8 enclosure port [CISPR 32]: Physical boundary of the EUT through which electromagnetic
fields may radiate.
3.1.9 immunity (to a disturbance) [b-IEC 60050-161]: The ability of a device, equipment or
system to perform without degradation in the presence of an electromagnetic disturbance.
3.1.10 immunity test level [b-IEC 60050-161]: The level of a test signal used to simulate an
electromagnetic disturbance when performing an immunity test.
3.1.11 information technology equipment (ITE) [CISPR 32]: Equipment having a primary
function of either (or a combination of) entry, storage, display, retrieval, transmission, processing,
switching, or control of data and/or telecommunication messages and which may be equipped with
one or more ports typically for information transfer.
3.1.12 multimedia equipment [CISPR 32]: Equipment that is information technology equipment,
audio equipment, video equipment, broadcast receiver equipment, entertainment lighting control
equipment or combinations of these.
3.1.13 optical fibre port [CISPR 32]: Port at which an optical fibre is connected to an equipment
4 K series – Supplement 10 (11/2017)
3.1.14 port [CISPR 32]: physical interface through which electromagnetic energy enters or leaves
the equipment under test.
3.1.15 residential location [IEC 61000-6-1]: Location which exists as an area of land designated
for the construction of domestic dwellings, and is characterized by the fact that equipment is
directly connected to a low-voltage public mains network or connected to a dedicated DC source
which is intended to interface between the equipment and the low-voltage mains network.
3.1.16 signal/control port [CISPR 32]: Port intended for the interconnection of components of an
equipment under test, or between an equipment under test and local auxiliary equipment and used in
accordance with relevant functional specifications (for example for the maximum length of cable
connected to it)
3.1.17 wired network port [CISPR 32]: Port for the connection of voice, data and signalling
transfers intended to interconnect widelydispersed systems by direct connection to a single-user or
multi-user communication network
3.2 Terms defined in this Supplement
This Supplement defines the following term:
3.2.1 telecommunication network: A network operated under a licence granted by a national
telecommunications authority which provides telecommunications between network termination
points (NTPs) (i.e., excluding terminal equipment beyond the NTPs).
4 Abbreviations and acronyms
This Supplement uses the following abbreviations and acronyms:
AC Alternating Current
AE Auxiliary Equipment
AM Amplitude Modulation
AMN Artificial Mains Network
AAN Artificial Asymmetric Network
CDN Coupling and Decoupling Network
CISPR International Special Committee on Radio Interference
CVP Capacitive Voltage Probe
DC Direct Current
DSL Digital Subscriber Line
EM Electromagnetic
EMC Electromagnetic Compatibility
ESD Electrostatic Discharge
EUT Equipment Under Test
FAR Fully Anechoic Room
FDD Frequency Domain Duplex
FSOATS Free Space Open Area Test Site
IoT Internet of Things
LTE Long Term Evolution
K series – Supplement 10 (11/2017) 5
MIMO Multiple-Input and Multiple-Output
NTP Network Termination Point
OATS Open Area Test Site
RF Radio Frequency
TDD Time Domain Duplex
TEM Transverse Electromagnetic
xDSL Generic term covering the family of all DSL technologies
5 Conventions
None.
6 Overview of 5G networks
5G is the fifth generation of mobile networks and a significant evolution of the 4G long term
evolution (LTE) networks. 5G has been designed to meet the very large growth in data and
connectivity of today's modern society, the Internet of things (IoT) with billions of connected
devices and tomorrow's innovations.
5G will initially operate in conjunction with existing 4G networks before evolving to fully
standalone networks in subsequent releases and coverage expansions.
6.1 5G spectrum
5G will predominately use additional spectrum in the 3-100 GHz range to add significantly more
capacity compared to the current mobile technologies. The additional spectrum and greater capacity
will enable more users, more data and faster connections. It is also expected that there will be future
reuse of existing low band spectrum for 5G as legacy networks decline in usage and to support
future use cases.
The increased spectrum also includes the millimetre (mm) wave band above 30 GHz. The mmWave
frequencies provide localised coverage as they mainly operate over short line of sight distances.
6.1.1 5G frequency band summary
– Low frequency (less than 1GHz) – providing widespread coverage across urban, suburban
and rural areas and supporting IoT for low data rate applications.
– Medium frequency (1–6GHz) – providing good coverage and high speeds and including the
expected initial 5G range of 3.3–3.8GHz which has been identified as the most likely band
for launching 5G globally.
– High frequency (above 6GHz) – providing ultra-high broadband speeds for advanced
mobile broadband applications and most suitable for applications in dense traffic hotspots.
The 26-28GHz band has been identified for future 5G applications
Spectrum for mobile telecommunication services including 5G is determined by the World
Radiocommunication Conferences (WRC) which are held every three to four years. It is the job of
WRC to review and, if necessary, revise the Radio Regulations, the international treaty governing
the use of the radio-frequency spectrum and the geostationary-satellite and non-geostationary-
satellite orbits. Revisions are made on the basis of an agenda determined by the ITU Council, which
takes into account recommendations made by previous world radiocommunication conferences.
The 5G standards are expected to support both frequency domain duplex (FDD) and time domain
duplex (TDD). Research is also underway on full duplex systems for 5G to transmit and receive
simultaneous on the same channel. Full duplex effectively doubles the spectrum efficiency.
6 K series – Supplement 10 (11/2017)
6.2 How 5G works
Most operators will initially integrate 5G networks with existing 4G networks to provide a
continuous connection.
A mobile network has two main components, the 'radio access network' and the 'core network'.
6.2.1 Radio access network
The radio access network consists of various types of facilities including small cells, towers, masts
and dedicated in-building and home systems which connect mobile users and wireless devices to the
main core network.
Small cells will be a major feature of 5G networks particularly at the new mmWave frequencies
where the connection range is very short. To provide a continuous connection, small cells will be
distributed in clusters depending on where users require connection and this will complement the
macro network.
5G macro cells will use multiple input, multiple output (MIMO) antennas that have multiple
elements or connections to send and receive more data simultaneously. The benefit to users is that
more people can simultaneously connect to the network and maintain high throughput.
MIMO antennas for 5G are often referred to as 'massive MIMO' due to the number of multiple
elements and connections however the physical size is similar to existing 3G and 4G base station
antennas.
6.2.2 Core network
The core network is the mobile exchange and data network that manages all of the mobile voice,
data and Internet connections. For 5G, the 'core network' is being redesigned to better integrate with
the Internet and cloud based services and also includes distributed servers across the network
improving response times (reducing latency).
Many of the advanced features of 5G including network virtualization and network slicing for
different applications and services, will be managed in the core.
When a 5G connection is established, the user equipment (or device) connects to the 4G network to
provide the control signalling and to the 5G network to help provide the fast data connection by
adding to the existing 4G carriage.
Where there is limited 5G coverage, the data is carried as today on the 4G network providing the
continuous connection. Essentially with this design, the 5G network is complementing the existing
4G network.
6.3 5G working with 4G
When a 5G connection is established, the user equipment (or device) connects to the 4G network to
provide the control signalling and to the 5G network to help provide the fast data connection by
adding to the existing 4G carriage.
Where there is limited 5G coverage, the data is carried as today on the 4G network providing the
continuous connection. Essentially with this design, the 5G network is complementing the existing
4G network.
7 Currently defined EMC requirements
The EM compatibility level among various devices and networks is ensured by the fact that each
device shall not generate disturbances above a defined level and that the devices will have a
minimum immunity level from disturbances.
Therefore, EMC standards include requirements for emission and immunity.
K series – Supplement 10 (11/2017) 7
The emission requirements are based on the limits defined by CISPR that are widely used to protect
radio services. Generic emission requirements are defined in [IEC 61000-6-3] and [IEC 61000-6-4]
while product specific emission requirements are defined in product standards.
Generic immunity requirements are defined in the standards [IEC 61000-6-1] and [IEC 61000-6-2]
while specific product standards have been produced taking into account the generic requirements,
the electromagnetic environmental classification given in [IEC 61000-2-5] and the specific product
functionality. The immunity requirements for multimedia equipment are defined in the [CISPR 35]
but there are also other product specific standards. [CISPR 35] also covers immunity requirements
of equipment with telecommunication functions.
The emission and immunity requirements considered in the present document to identify the most
suitable EMC requirements for 5G systems are the one published in the publications [CISPR 32]
and [CISPR 35] as these standards apply to multimedia equipment including also information
technology equipment. A summary of the requirements in [CISPR 32] and [CISPR 35] is provided
in the following clauses.
7.1 Emission requirements in [CISPR 32]
In Tables 1 to 6 is provided the summary of the emission requirements that are published in
[CISPR 32].
Table 1 – Class A limits for radiated emissions in [CISPR 32]
Phenomena Frequency
range
Measurement
distance
Limits Detector type Reference test
method
Radiated
emissions
30 MHz –
200 MHz
10 m
(FAR/OATS)
40 dBµV/m Quasi-Peak
[CISPR 16-2-3]
200 MHz –
1000 MHz
10 m
(FAR/OATS)
47 dBµV/m
1000 MHz –
3000 MHz
3 m (FSOATS) 56 dBµV/m Average
76 dBµV/m Peak
3000 MHz –
6000 MHz
3 m (FSOATS) 60 dBµV/m Average
80 dBµV/m Peak
Table 2 – Class A limits for conducted emissions on AC mains ports in [CISPR 32]
Phenomena Frequency range Limits Detector type Reference test
method
Conducted emissions
on AC port
0.15 MHz –
0.5 MHz
79 dBµV Quasi-Peak
[CISPR 16-2-1] 0.5 MHz – 30 MHz 73 dBµV
0.15 MHz –
0.5 MHz
66 dBµV Average
0.5 MHz – 30 MHz 60 dBµV
8 K series – Supplement 10 (11/2017)
Table 3 – Class A limits for conducted emissions on wired network ports in [CISPR 32]
Phenomena Frequency
range
Voltage limits Current
limits
Detector type Reference test
method
Conducted
emissions on
wired network
ports
0.15 MHz –
0.5 MHz
97 to 87 dBµV
Not
applicable
Quasi-Peak
[CISPR 16-2-1]
(with AAN)
0.5 MHz –
30 MHz
87 dBµV
0.15 MHz –
0.5 MHz
84 to 74 dBµV Average
0.5 MHz –
30 MHz
74 dBµV
0.15 MHz –
0.5 MHz
97 to 87 dBµV 53 to 43
dBµA
Quasi-Peak
[CISPR 16-2-1]
(with CVP and
Current Probe)
0,5 MHz – 30
MHz
87 dBµV 43 dBµA
0,15 MHz – 0,5
MHz
84 to 74 dBµV 40 to 30
dBµA
Average
0,5 MHz – 30
MHz
74 dBµV 30 dBµA
0,15 MHz – 0,5
MHz
Not applicable
53 to 43
dBµA
Quasi-Peak
[CISPR 16-2-1]
(with Current
Probe)
0,5 MHz – 30
MHz
43 dBµA
0,15 MHz – 0,5
MHz
40 to 30
dBµA
Average
0,5 MHz – 30
MHz
30 dBµA
Table 4 – Class B limits for radiated emissions in [CISPR 32]
Phenomena Frequency
range
Measurement
distance
Limits Detector type Reference test
method
Radiated
emissions
30 MHz – 200
MHz
10 m
(FAR/OATS)
30 dBµV/m Quasi-Peak
[CISPR 16-2-3]
200 MHz – 1000
MHz
10 m
(FAR/OATS)
37 dBµV/m
1000 MHz –
3000 MHz
3 m (FSOATS) 50 dBµV/m Average
70 dBµV/m Peak
3000 MHz –
6000 MHz
3 m (FSOATS) 54 dBµV/m Average
74 dBµV/m Peak
K series – Supplement 10 (11/2017) 9
Table 5 – Class B limits for conducted emissions on AC mains ports in [CISPR 32]
Phenomena Frequency range Limits Detector type Reference test
method
Conducted emissions
on AC port
0,15 MHz – 0,5 MHz 66 to 56 dBµV
Quasi-Peak
[CISPR 16-2-1]
0,5 MHz – 5 MHz 56 dBµV
5 MHz – 30 MHz 60 dBµV
0,15 MHz – 0,5 MHz 56 to 46 dBµV
Average 0,5 MHz – 5 MHz 46 dBµV
5 MHz – 30 MHz 50 dBµV
Table 6 – Class B limits for conducted emissions on wired network ports in [CISPR 32]
Phenomena Frequency
range
Voltage limits Current
limits
Detector type Reference test
method
Conducted
emissions on
wired network
ports
0,15 MHz – 0,5
MHz
84 to 74 dBµV
Not
applicable
Quasi-Peak
[CISPR 16-2-1]
(with AAN)
0,5 MHz – 30
MHz
74 dBµV
0,15 MHz – 0,5
MHz
74 to 64 dBµV Average
0,5 MHz – 30
MHz
64 dBµV
0,15 MHz – 0,5
MHz
84 to 74 dBµV 40 to 30
dBµA
Quasi-Peak
[CISPR 16-2-1]
(with CVP and
Current Probe)
0,5 MHz – 30
MHz
74 dBµV 30 dBµA
0,15 MHz – 0,5
MHz
74 to 64 dBµV 30 to 20
dBµA
Average
0,5 MHz – 30
MHz
64 dBµV 20 dBµA
0,15 MHz – 0,5
MHz
Not applicable
40 to 30
dBµA
Quasi-Peak
[CISPR 16-2-1]
(with Current
Probe)
0,5 MHz – 30
MHz
30 dBµA
0,15 MHz – 0,5
MHz
30 to 20
dBµA
Average
0,5 MHz – 30
MHz
20 dBµA
7.2 Immunity requirements in [CISPR 35]
In Tables 7 to 10 is provided the summary of the immunity requirements that are published in
[CISPR 35]. For the immunity requirements, the following generic performance criteria are defined:
Performance criterion A
The equipment shall continue to operate as intended without operator intervention. No degradation
of performance, loss of function or change of operating state is allowed below a performance level
specified by the manufacturer when the equipment is used as intended.
10 K series – Supplement 10 (11/2017)
The performance level may be replaced by a permissible loss of performance. If the minimum
performance level or the permissible performance loss is not specified by the manufacturer, then
either of these may be derived from the product description and documentation and by what the user
may reasonably expect from the equipment if used as intended.
Performance criterion B
During the application of the disturbance, degradation of performance is allowed. However, no
unintended change of actual operating state or stored data is allowed to persist after the test.
After the test, the equipment shall continue to operate as intended without operator intervention; no
degradation of performance or loss of function is allowed, below a performance level specified by
the manufacturer, when the equipment is used as intended.
The performance level may be replaced by a permissible loss of performance.
If the minimum performance level (or the permissible performance loss), or recovery time, is not
specified by the manufacturer, then either of these may be derived from the product description and
documentation and by what the user may reasonably expect from the equipment if used as intended.
Performance criterion C
Loss of function is allowed, provided the function is self-recoverable, or can be restored by the
operation of the controls by the user in accordance with the manufacturer's instructions. A reboot or
re-start operation is allowed.
Information stored in non-volatile memory, or protected by a battery backup, shall not be lost.
Table 7 – Immunity requirements on enclosure port in [CISPR 35]
Phenomenon Reference test
method
Test level Performance criterion
Electrostatic discharges [IEC 61000-4-2] Contact: 4 kV
Air: 8 kV
B
B
Radio frequency
electromagnetic field
amplitude modulated
[IEC 61000-4-3]
Or
[IEC 61000-4-20]
Or
[IEC 61000-4-21]
80 MHz – 1 GHz
3 V/m
(80% AM modulation at 1
kHz)
A
Spot frequencies:
1,8 GHz
2,6 GHz
3,5 GHz
5 GHz
3 V/m
(80% AM modulation at 1
kHz)
A
Power frequency
magnetic field (only
applicable to EUT with
devices susceptible to
magnetic field)
[IEC 61000-4-8] 50 Hz
1 A/m
A
K series – Supplement 10 (11/2017) 11
Table 8 – Immunity requirements for analogue/digital signal ports in [CISPR 35]
Phenomenon Reference test method Test level Performance
criterion
Continuous induced RF
disturbances
[IEC 61000-4-6] 0,15 – 10 MHz
3 V
A
10 MHz – 30 MHz
3 V to 1 V
30 MHz 80 MHz
1 V
Broadband impulse noise
disturbances, repetitive
(only applicable to CPE)
[CISPR 35] 0,15 to 0,5 MHz
107 dbµV
A
0,5 MHz to 10 MHz
107 to 36 dBµV
10 MHz – 30 MHz
36 to 30 dBµV
Burst duration: 0,7 ms
Burst period: 10 ms
Broadband impulse noise
disturbances, isolated
(only applicable to CPE)
[CISPR 35] 0,15 to 30 MHz
110 dbµV
Burst duration: 0,24 ms,
10 ms, 300 ms
B
Electrical Fast transients [IEC 61000-4-4] 0,5 kV
Rep. freq: 5 kHz and 100
kHz on xDSL ports
B
Surges (outdoor lines) [IEC 61000-4-5] Unshielded symmetrical
lines:
Pulse: 10µs/700µs
Lines to Ground: 1 kV
without primary
protections
Lines to Ground: 4 kV
with primary protections
B
C
12 K series – Supplement 10 (11/2017)
Table 8 – Immunity requirements for analogue/digital signal ports in [CISPR 35]
Phenomenon Reference test method Test level Performance
criterion
Coaxial or shielded lines:
Pulse: 1,2µs/50µs
Shield to Ground: 0,5 kV
B
Surges (indoor lines) None
Table 9 – Immunity requirements for AC power ports in [CISPR 35]
Phenomenon Reference test method Test level Performance
criterion
Continuous induced RF
disturbances
[IEC 61000-4-6] 0,15 – 10 MHz
3 V
A
10 MHz – 30 MHz
3 V to 1 V
30 MHz 80 MHz
1 V
Electrical Fast transients [IEC 61000-4-4] 1 kV
Rep. freq: 5 kHz
B
Surges [IEC 61000-4-5] Pulse: 1,2µs/50µs
Shield to Ground: 2kV
Line to Line: 1 kV
B
B
Voltage dips [IEC 61000-4-11] Residual voltage < 5%
Number of cycles: 0,5
B
Residual voltage < 70%
Number of cycles: 25
C
Voltage interruptions [IEC 61000-4-11] Residual voltage 0%
Number of cycles: 250
C
K series – Supplement 10 (11/2017) 13
Table 10 – Immunity requirements for DC power ports in [CISPR 35] (only applicable to
ports with cables that may be longer than 3 m)
Phenomenon Reference test method Test level Performance criterion
Continuous induced
RF disturbances
[IEC 61000-4-6] 0,15 – 10 MHz
3 V
A
10 MHz – 30 MHz
3 V to 1 V
30 MHz 80 MHz
1 V
Electrical Fast
transients
[IEC 61000-4-4] 0,5 kV
Rep. freq: 5 kHz
B
Surges [IEC 61000-4-5] Pulse: 1,2µs/50µs
Line to Ground: 0,5 kV
Only applicable to
outdoor cables
B
8 Analysis of the published EMC requirements in respect to 5G scenario
The EMC requirements for 5G should be defined considering the following aspects:
– Products, other than 5G radio devices, should have emission requirements in the frequency
range utilized by 5G systems to avoid interferences with 5G networks.
– Products, including 5G devices, should have immunity requirements in the frequency range
of the 5 G networks.
– The emission requirements of 5G transmitters and receivers are covered by ITU-R
recommendations.
Then, with reference to the EMC requirements defined for multimedia equipment in [CISPR 32]
and [CISPR 35] and taking into account the above aspects, the following gaps have been identified:
– Radiated emission requirements in generic and product standards do not cover the entire
frequency band planned for 5G systems;
– Conducted emission requirements for DC power ports are not defined in [CISPR 32] but
are present in the IEC generic emission standards and in the EMC standards for radio and
telecommunication equipment such as in [ITU-T K.48], [ETSI EN 300 386] and
[ETSI EN 301 489-1];
– Radiated immunity requirements in generic and product standards stops at 6 GHz or at
lower frequencies. This is not enough to avoid disturbances on circuits/devices with
frequency clocks higher than 6 GHz;
– Conducted radio frequency (RF) immunity requirements in [CISPR 35] are lower than IEC
generic immunity standards and in the EMC standards for radio and telecommunication
equipment such as in [ITU-T K.48], [ETSI EN 300 386] and [ETSI EN 301 489-1];
– Surge immunity requirements for ports intended for connecting indoor cables are not
defined in [CISPR 35] but they are present in the EMC standards for radio and
14 K series – Supplement 10 (11/2017)
telecommunication equipment such as in [ITU-T K.48], [ETSI EN 300 386] and [ETSI EN
301 489-1].
9 Proposal of EMC requirements for the deployment of 5G networks
The coexistence of 5G networks with other devices and wired networks requires that the present
EMC emission standards should be amended to reduce disturbances to 5G receivers. On the other
hand, EMC immunity standards should also be revised to allow the correct operation of devices
when subjected to RF radiation from 5G transmitters.
The requirements outlined in clauses 9.1 to 9.8 may be considered with reference to the gap analysis
performed in clause 8.
9.1 Radiated emissions
The radiated emission requirements should be extended at least up to 40 GHz but later should be
increased up to 100 GHz to protect the frequency band used for 5G systems. Limits above 6 GHz
are defined in [b-FCC 47 CFR part 15] regulation up to 40 GHz and in [CISPR 11] up to 18 GHz.
Moreover, study of the suitable limits to protect 5G systems is started in CISPR but, for the time
being, there is no yet proposal. Therefore, for the time being the following preliminary emission
limits are recommended for inclusion in the Generic and product emission standards (exclusions on
the applicability of such limits should be defined in product specific standards) and in the EMC
standards for 5G systems:
1) Frequency range 30 MHz – 6000 MHz: limits in table 1 and 4 should apply.
2) Frequency range 6000 MHz – 40000 MHz: limits in table 11 and 12 should apply.
Class B limits of tables 4 and 12 should apply to residential environments as defined in [CISPR 32]
Table 11 – Class A limits for radiated emissions above 6 GHz
Phenomena Frequency
range
Measurement
distance
Limits Detector type Reference test
method
Radiated
emissions
6000 MHz –
40000 MHz
3 m (FSOATS) 60 dBµV/m Average [CISPR 16-2-3]
80 dBµV/m Peak
Table 12 – Class B limits for radiated emissions above 6 GHz
Phenomena Frequency
range
Measurement
distance
Limits Detector type Reference test
method
Radiated
emissions
6000 MHz –
40000 MHz
3 m (FSOATS) 54 dBµV/m Average [CISPR 16-2-3]
74 dBµV/m Peak
9.2 Conducted emissions on AC mains port
This requirement is already consolidated in all EMC standards and no amendments are required.
The limits in tables 2 and 5 should apply. Class B limits of table 5 should apply to residential
environments as defined in [CISPR 32].
9.3 Conducted emissions on DC power port
This requirement is not defined in [CISPR 32] but is present in the IEC generic emission standards
and in the following standards for radio and telecommunication equipment: [ITU-T K.48],
[ETSI EN 300 386] and [ETSI EN 301 489-1]. This requirement is recommended for inclusion in
K series – Supplement 10 (11/2017) 15
the product emission standards (exclusions should be defined in product specific standards) and in
the EMC standards for 5G systems.
The limits and measurement method in tables 2 and 5 should also apply to DC power ports. Class B
limits of table 5 should apply to residential environments as defined in [CISPR 32].
9.4 Conducted emissions on wired network ports
This requirement is already well defined in [CISPR 32] and no amendments are required. The limits
in tables 3 and 6 should apply. Class B limits of table 6 should apply to residential environments as
defined in [CISPR 32].
9.5 Immunity requirements on enclosure port
Radiated immunity requirements in generic and product standards stops at 6 GHz or at lower
frequencies. This requirement should be extended up to 18 GHz considering that non-radio products
might be disturbed by 5G transmitters at frequencies up to 18 GHz. No requirement above 18 GHz
should be defined at the present because it is not expected that non-radio products have sensitive
circuits that can be disturbed by electromagnetic field at frequencies higher than 18 GHz.
Furthermore, the immunity level in the frequency bands of mobile services should be increased to
10 V/m for the products that have key functions (e.g., telecommunication network equipment).
Regarding immunity against electrostatic discharge, the present [CISPR 35] requirements should
apply with no changes.
Then, the immunity requirements on enclosure port in Generic and product immunity standards
should be defined according to table 13. In bold letters are identified the requirements deviating
from [CISPR 35]
Table 13 – Immunity requirements on enclosure port
Phenomenon Reference test
method
Test level Performance criterion
Electrostatic discharges [IEC 61000-4-2] Contact: 4 kV
Air: 8 kV
B
B
Radio frequency
electromagnetic field
amplitude modulated
[IEC 61000-4-3]
Or
[IEC 61000-4-20]
Or
[IEC 61000-4-21]
80 MHz – 750 MHz
3 V/m
750 MHz – 18 GHz
3 V/m or 10 V/m (higher
level applies to
telecommunication
network equipment)
(80% AM modulation at
1 kHz)
A
Power frequency
magnetic field (only
applicable to EUT with
devices susceptible to
magnetic field)
[IEC 61000-4-8] 50 Hz
1 A/m
A
9.6 Immunity requirements on analogue and digital signal and network ports
The requirements of [CISPR 35] should apply with the following changes:
– Conducted RF immunity requirements should be in line with generic immunity standards
16 K series – Supplement 10 (11/2017)
– Surge immunity requirements for ports intended for connecting indoor cables should be
also considered for some products where failures can impact several users
(e.g., telecommunication network equipment)
Then, the immunity requirements for analogues/digital signal port in Generic and product immunity
standards should be defined according to table 14. In bold letters are identified the requirements
deviating from [CISPR 35].
Table 14 – Immunity requirements for analogue/digital signal ports
Phenomenon Reference test method Test level Performance
criterion
Continuous induced RF
disturbances
[IEC 61000-4-6] 0,15 – 80 MHz
3 V
A
Broadband impulse noise
disturbances, repetitive
(only applicable to CPE)
[CISPR 35] 0,15 to 0,5 MHz
107 dbµV
A
0,5 MHz to 10 MHz
107 to 36 dBµV
10 MHz – 30 MHz
36 to 30 dBµV
Burst duration: 0,7 ms
Burst period: 10 ms
Broadband impulse noise
disturbances, isolated
(only applicable to CPE)
[CISPR 35] 0,15 to 30 MHz
110 dBµV
Burst duration: 0,24 ms,
10 ms, 300 ms
B
Electrical Fast transients [IEC 61000-4-4] 0,5 kV
Rep. freq: 5 kHz and 100
kHz on xDSL ports
B
Surges (outdoor lines) [IEC 61000-4-5] Unshielded symmetrical
lines:
Pulse: 10 µs/700 µs
Lines to Ground: 1 kV
without primary
protections
Lines to Ground: 4 kV
with primary protections
B
C
K series – Supplement 10 (11/2017) 17
Table 14 – Immunity requirements for analogue/digital signal ports
Phenomenon Reference test method Test level Performance
criterion
Coaxial or shielded lines:
Pulse: 1,2 µs/50 µs
Shield to Ground: 0,5 kV
B
Surges (indoor lines) [IEC 61000-4-5] Unshielded
symmetrical and
asymmetrical lines:
Pulse: 1,2 µs/50 µs
Lines to Ground:
0,5 kV without primary
protections
B
[IEC 61000-4-5] Coaxial or shielded
lines:
Pulse: 1,2 µs/50 µs
Shield to Ground:
0,5 kV
B
9.7 Immunity requirements on AC mains port
The requirements of [CISPR 35] should apply but conducted RF immunity requirements should be
change in line with generic immunity standards.
The immunity requirements for AC mains port in Generic and product immunity standards should
be defined according to table 15. In bold letters are identified the requirements deviating from
[CISPR 35]
Table 15 – Immunity requirements for AC power ports
Phenomenon Reference test method Test level Performance
criterion
Continuous induced RF
disturbances
[IEC 61000-4-6] 0,15 – 80 MHz
3 V
A
Electrical Fast transients [IEC 61000-4-4] 1 kV
Rep. freq: 5 kHz
B
Surges [IEC 61000-4-5] Pulse: 1,2 µs/50 µs
Shield to Ground: 2kV
Line to Line: 1 kV
B
B
Voltage dips [IEC 61000-4-11] Residual voltage < 5%
Number of cycles: 0,5
B
Residual voltage < 70%
Number of cycles: 25
C
18 K series – Supplement 10 (11/2017)
Table 15 – Immunity requirements for AC power ports
Phenomenon Reference test method Test level Performance
criterion
Voltage interruptions [IEC 61000-4-11] Residual voltage 0%
Number of cycles: 250
C
9.8 Immunity requirements on DC power port
The requirements of [CISPR 35] should apply with the following changes:
– Conducted RF immunity requirements should be in line with generic immunity standards;
– Surge immunity test should apply to indoor cables too
The immunity requirements for DC power port in Generic and product immunity standards should
be defined according to table 16. In bold letters are identified the requirements deviating from
[CISPR 35].
Table 16 – Immunity requirements for DC power ports
(only applicable to ports with cables that may be longer than 3 m)
Phenomenon Reference test method Test level Performance criterion
Continuous induced
RF disturbances
IEC 61000-4-6 0,15 – 80 MHz
3 V
A
Electrical Fast
transients
IEC 61000-4-4 0,5 kV
Rep. freq: 5 kHz
B
Surges IEC 61000-4-5 Pulse: 1,2 µs/50 µs
Line to Ground: 0,5 kV
B
10 Recommendation for future work
The EMC requirements recommended in this document for the coexistence of 5G networks with
other devices and wired networks are provided as preliminary requirements. These requirements
shall be revised considering:
– The 5G specifications when published.
– The radiated emission limits above 6 GHz that will be defined by CISPR (if different from
the limits proposed in this document).
– The possibility to define single radiated emission limits for radio and non-radio devices.
This item shall be discussed and coordinated with ITU-R.
– The radiated immunity requirements that might be identified when 5G specification are
published.
– Specific test setups and performance criteria for 5G systems.
K series – Supplement 10 (11/2017) 19
Bibliography
[b-IEC 60050-161] IEC 60050-161:1990, International Electrotechnical Vocabulary.
Chapter 161: Electromagnetic compatibility. https://webstore.iec.ch/publication/181
[b-FCC 47 CFR part 15] Federal Communications Commission (FCC), Code of Federal
Regulations, Title 47, Part 15 (47 CFR 15); https://www.fcc.gov/general/rules-regulations-title-47
Printed in Switzerland Geneva, 2018
SERIES OF ITU-T RECOMMENDATIONS
Series A Organization of the work of ITU-T
Series D Tariff and accounting principles and international telecommunication/ICT economic and
policy issues
Series E Overall network operation, telephone service, service operation and human factors
Series F Non-telephone telecommunication services
Series G Transmission systems and media, digital systems and networks
Series H Audiovisual and multimedia systems
Series I Integrated services digital network
Series J Cable networks and transmission of television, sound programme and other multimedia
signals
Series K Protection against interference
Series L Environment and ICTs, climate change, e-waste, energy efficiency; construction, installation
and protection of cables and other elements of outside plant
Series M Telecommunication management, including TMN and network maintenance
Series N Maintenance: international sound programme and television transmission circuits
Series O Specifications of measuring equipment
Series P Telephone transmission quality, telephone installations, local line networks
Series Q Switching and signalling, and associated measurements and tests
Series R Telegraph transmission
Series S Telegraph services terminal equipment
Series T Terminals for telematic services
Series U Telegraph switching
Series V Data communication over the telephone network
Series X Data networks, open system communications and security
Series Y Global information infrastructure, Internet protocol aspects, next-generation networks,
Internet of Things and smart cities
Series Z Languages and general software aspects for telecommunication systems